I didnt say that using dvd-decrypter would give problem per say, perhaps you are one of those that know how to use it correct, perhaps you have only tried the movies that does not give troubles, and perhaps region2 dvd's are less prone to problems.
There are many possible explanations.
All I said was - IF you do have troubles, then why not try the obvious, namely rip again using smartripper like me and others have suggested before.
It seems logical to me that ripping once more with smartripper is less work than ripping 19 times more with decrypter and still getting the same error, but hey thats just me, perhaps others fail to see the logic in this way of routing out possible errors
I have both, and use both, and I cannot understand why its so important to people to use one specificly that they dont want to try using the other. They are both 2 small pieces of software, they are both freeware, whats the big deal in having both and using the one that works for the project you are working with.